20502663 has 16 divisors (see below), whose sum is σ = 29276640. Its totient is φ = 12717056.

The previous prime is 20502641. The next prime is 20502667. The reversal of 20502663 is 36620502.

It is a cyclic number.

It is not a de Polignac number, because 20502663 - 2⁵ = 20502631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20502667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2281 + ... + 6797.

It is an arithmetic number, because the mean of its divisors is an integer number (1829790).

Almost surely, 2^20502663 is an apocalyptic number.

20502663 is a deficient number, since it is larger than the sum of its proper divisors (8773977).

20502663 is a wasteful number, since it uses less digits than its factorization.

20502663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20502663 is about 4527.9866386729. The cubic root of 20502663 is about 273.6970340178.

The spelling of 20502663 in words is "twenty million, five hundred two thousand, six hundred sixty-three".